A very skilled front end web developer that I know and respect, recommended that I look into creating Tumblr themes, as a means of building my portfolio up. I decided to check out the dash.generalassemb.ly tumblr project.
I skipped the HTML & CSS basics part I and went straight to part 2 BUILD A TUMBLR THEME FOR GENE. I feel, if you already have a good amount of HTML & CSS knowledge, you can do the same. The lesson was pretty straight forward. Be warned, you will get an error if you don’t have everything exactly the way they want. An extra space or a line of code on another line, will make it seem your code is wrong, even though it is semantically correct. It happened to me two times. Kind of annoying.